import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;

public class GetRecords
{
    public static void main(String a[])
    {    
        try    
        {      
           String authtoken = "AUTHTOKEN";
           String targetURL = "https://<APPDOMAIN>/crm/private/xml/Leads/getRecords";
           PostMethod post = new PostMethod(targetURL);
           post.setRequestHeader("Authorization",authtoken);
           post.setParameter("scope","crmapi");
           HttpClient httpclient = new HttpClient();
           httpclient.executeMethod(post);
           String postResp = post.getResponseBodyAsString();
           System.out.println("The Response from the server : "+postResp);
        } 
        catch(Exception e)
        {
            e.printStackTrace();
        }    
    }
}

<?php

              header("Content-type: application/xml");
              $token="AUTHTOKEN";
              $url = "https://<APPDOMAIN>/crm/private/xml/Leads/getRecords";
              $param= "authtoken=".$token."&scope=crmapi";
              $ch = curl_init();
              curl_setopt($ch, CURLOPT_URL, $url);
              curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
              curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
              curl_setopt($ch, CURLOPT_TIMEOUT, 30);
              curl_setopt($ch, CURLOPT_POST, 1);
              curl_setopt($ch, CURLOPT_POSTFIELDS, $param);
              $result = curl_exec($ch);
              curl_close($ch);
              echo $result;
              return $result;

?>

import urllib
import urllib2
module_name = 'Leads'
authtoken = 'Your authtoken'
params = {'authtoken':authtoken,'scope':'crmapi'}
final_URL = "https://<APPDOMAIN>/crm/private/xml/"+module_name+"/getRecords"
data = urllib.urlencode(params)
request = urllib2.Request(final_URL,data)
response = urllib2.urlopen(request)
xml_response = response.read()
print xml_response

using System;
using System.Net;
using System.IO;
using System.Web;
using System.Text;
using System.Net.Security;
public class ZohoCRMAPI
{
public static string zohocrmurl = "https://<APPDOMAIN>/crm/private/xml/";
public static void Main (string[] args)
{
string result = APIMethod("Leads","getRecords","508020000000332001");//Change the id,method name, and module name here
Console.Write(result);
}
public static String APIMethod(string modulename,string methodname,string recordId)
{
string uri = zohocrmurl + modulename + "/"+methodname+"?";
/* Append your parameters here */
string postContent = "scope=crmapi";
postContent = postContent + "&authtoken=0ac32dc177c4918eca902fd290a92f4a";//Give your authtoken
if (methodname.Equals("insertRecords") || methodname.Equals("updateRecords"))
{
postContent = postContent + "&xmlData="+ HttpUtility.UrlEncode("Your CompanyHannahSmithtesting@testing.com");
}
if (methodname.Equals("updateRecords") || methodname.Equals("deleteRecords") || methodname.Equals("getRecordById"))
{
postContent = postContent + "&id="+recordId;
}
string result = AccessCRM(uri, postContent);
return result;
}
public static string AccessCRM(string url, string postcontent)
{
WebRequest request = WebRequest.Create(url);
request.Method = "POST";
byte[] byteArray = Encoding.UTF8.GetBytes(postcontent);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
reader.Close();
dataStream.Close();
response.Close();
return responseFromServer;
}
}

<Invoices>
   <row no="1">
       ...all other invoice attributes...
        <FL val="Product Details">
            <product no="1">
                <FL val="Product Id">___your_zoho_productId___</FL>
                <FL val="Product Name">___your_zoho_product_name___</FL>
                <FL val="Quantity">1</FL>
                <FL val="List Price">1.00</FL>
                <FL val="Discount">0</FL>
                <FL val="Total">1.00</FL>
                <FL val="Total After Discount">1.00</FL>
                <FL val="Tax">0</FL>
                <FL val="Net Total">1.00</FL>
            </product>
       </FL>
      ...any other invoice attributes...
    </row>
</Invoices>

<Potentials>
<row no="1">
<FL val="Potential Name">First Potential</FL>
<FL val="Description">description of the potential</FL>
<FL val="Closing Date"> 01/04/2009 </FL>
<FL val=" ACCOUNTID" >Your__Account__ID</FL>
<FL val="Email">test@test.test</FL>
<FL val="Stage">"-data-"</FL>
<FL val="boolean flag">TRUE</FL>
<FL val="product">FREE</FL>
<FL val="Date of Birth"> 01/01/1970</FL>
<FL val="Mailing City">Germany</FL>
</row>
</Potentials>

<Accounts>
<row no="1">
<FL val="Account Name">TestUser</FL>
<FL val="Email">test@test.test</FL>
<FL val="boolean flag">TRUE</FL>
<FL val="First contact">01/01/2009</FL>
<FL val="Last Login">05/10/2009</FL>
<FL val="Created Time">2009-05-10 14:45:56</FL>
</row>
</Accounts>

<Invoices>
<row no="1">
...all other invoice attributes...
<FL val="Product Details">
<product no="1">
<FL val="Product Id">___your_zoho_productId___</FL>
<FL val="Product Name">___your_zoho_product_name___</FL>
<FL val="Quantity">1</FL>
<FL val="List Price">1.00</FL>
<FL val="Discount">0</FL>
<FL val="Total">1.00</FL>
<FL val="Total After Discount">1.00</FL>
<FL val="Tax">0</FL>
<FL val="Net Total">1.00</FL>
</product>
</FL> ...any other invoice attributes...
</row>
</Invoices>

<?php
$username = "testUsername";
$password = "testPassword";
$param = "SCOPE=ZohoCRM/crmapi&EMAIL_ID=".$username."&PASSWORD=".$password;
$ch = curl_init("https://accounts.zoho.com/apiauthtoken/nb/create");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $param);
$result = curl_exec($ch);
/*This part of the code below will separate the Authtoken from the result. 
Remove this part if you just need only the result*/
$anArray = explode("\n",$result);
$authToken = explode("=",$anArray['2']);
$cmp = strcmp($authToken['0'],"AUTHTOKEN");
echo $anArray['2'].""; if ($cmp == 0)
{
echo "Created Authtoken is : ".$authToken['1'];
return $authToken['1'];
}
curl_close($ch);
?>

import urllib
import urllib2
#You should have the price book id and product id, for using this API.
authtoken = 'Your authtoken'
pricebook_id = '508020142132343432'
product_id = '508020014316189251'
list_price = '900'
params = {'authtoken':authtoken,'scope':'crmapi','id':pricebook_id,'xmlData':''+product_id+''
+list_price+'','relatedModule':'Products'}
final_URL = "https://<APPDOMAIN>/crm/private/xml/PriceBooks/updateRelatedRecords"
data = urllib.urlencode(params)
request = urllib2.Request(final_URL,data)
response = urllib2.urlopen(request)
xml_response = response.read()
print xml_response